Diamond pbo



(No Model.)

H. COSSETTE.

GORE LIFTER FOR ANNULAR ROCK DRILLS. No. 377,239.

Patented Jan. 81, 1888.

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WITNESSES INVENTEJR pea $1.0

ATT R Y iiNrrn TATES ATENT HENRY COSSETTE, OF GHAMFLAIN, QUEBEC, CANADA, ASSIGNOR TO THE DIAMOND PROSPECTING COMPANY, OF CHICAGO, ILLINOIS.

CORE-LIFTER FOR ANNULAR ROCK-DRILLS.

SPECIFICATION forming part of Letters Patent No. 377,239, dated January 31, 1888.

(No model.)

To all whom, it may concern;

Be it known that I, HENRY Cossnrrn, of Champlain, in the Province of Quebec and Dominion of Canada, haveinvented a new and ImprovedCore-LifterforAnnularRock-Drills; and I do hereby declare that the following isa full and exact description of the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon. to My improvement has primarily for its aim the bringing up the cores made by the annular drills in soft or broken strata, where what is desired is to secure pieces of core which have been already broken off. Heretofore for this purpose there has been used some form of frictional device or a series of springs which rest against and tend to destroy the pieces of core while the core is passing upward into the core-barrel, and which are designed to close down behind the pieces that have passed through the springs. The practical working of such is obviously destructive in a greater or less degree of the soft cores, to preserve which is ordinarily the chief aim of the work, and they are more or less ineffective in their practical working, and are themselves quickly worn out or destroyed.

My device avoids allpractical friction against the core while it is passing upward, but prevents it from dropping out of the core-barrel when the drill-rod is drawn up. Its very great advantages are the combination of great strength and a wide range of movement,which the others lack, and it is cheap and durable 3 5 and effective.

In order to better understand this invention, reference should be had to the accompanying drawings, in which- Figure l is a central vertical sectional view of my improvement as inserted in a core-lifter shell and between a core-barrel and an annular drill-head. Fig. 2 is a side view of my core-lifter. Fig. 3 is a front view of the tilting catch, and Fig. 4 is a side view of the same.

In different drawings like letters refer to corresponding parts.

Y A represents the annular drill-head, which is screwed to the tube or shell B.

O is the lower end of the section of the drillrod, commonly known as the core-barrel.

The shell B is made thinner in its wall, and

consequently with largerinside diameter, than either A or O, and a recess or cylindrical chamber is thus formed with shoulders at top and bottom.

D is a cylindrical holder, which fits freely in the last-mentioned recess or chamber, and is a part of the core-lifter. It is preferably provided in its outer circumference with grooves E E for water-ways, and for a part of its length with open spaces J for the reception of the catches and springs hereinafter mentioned.

F F are catches provided with shoulders G G, which fit freely in a recess, H H, made in the exterior ofthe holder D. These shoulders are preferably not at the extreme end of the catch; but below them is an extension, K, so constructed as to prevent the catch from falling below the desired angle in the shell,thereb v 7o preventing the core from forcing the catch down too far.

I is a light spring riveted or otherwise secured to the outside of the holder D, and hearing against the catch F when the latter is up- 7 right, and tending to ,keep the catch just off the perpendicular.

I prefer to make the lifter with four of these catches and springs; but of course one or any reasonable number can be used.

The practical operation of my core-lifting device isasfollows: As the drill-rod advances, the core comes up into and through the shell and lifter, raising the catches F, which offer no substantial resistance to its passage. In 8 5 case the core should fill the holder D so far as to raise the catch to a perpendicular position the springI comes into action, not sufficiently to throw-it forcibly against the core, but so that when the core gives place the catch can- 90 not remain in a perpendicular position, but

' will rest against the core and will fall into any openings or breaks in the core as the core, piece by piece, is forced up. As the catch falls, the lower end comes against the spring, (or, in 9 5 the absence of the spring, against the shell,) and is thereby held from falling below the horizontal. When the drill-rod is pulled up,

the catches hold and prevent the core from falling out of the barrel.

It is obvious that my catch could be used without the springs I, or that some other simple IOC 2. The combination, with the core-barrel of an annular rock-drill, of a core-lifter consisting of an inside jacket or casing, D, provided with one or more vertical slots, J, as many tilting catches F, hinged in said slots near their lower ends, and a spring, I, secured to said jacket or casing behind each catch, substantially as described.

3. The combination, with the core-barrel of an annular rock-drill, of a core-lifter consisting of an inside j acket or casing, D, provided with one or more vertical slots, J, and two horizontal recesses, H H, near the base of each 25 slot, and with a tilting catch, F, for each slot having-two side lugs, G G, adapted. to fit in the recesses H H, and an end lug, K, substantially as and for the purposes set forth.

4 The combination, with the core-barrel of 0 an annular rock-drill, of a core-lifter consisting of an inside jacket or casing, D, provided with one or more vertical slots, J, and two horizontal recesses, H. H, near the base of each slot, one or more tilting catches, F, having two side 3 5 lugs, G G, and an end 111g, K, and one or more springs, I, secured to said jacket or casing behind the catches, substantially as and for the purposes set forth.

In testimony whereof I affix my signature in 40 presence of two witnesses. I

HENRY COSSETTE.

WVitnesses:

WARREN J. DURHAM, GEORGE E. JARVIS. 

